Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1990-07-20
1992-02-11
Beck, Shrive
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505737, 505741, 427 62, 427226, 4271263, 427282, B05D 512, B05D 302
Patent
active
050876074
ABSTRACT:
A process of forming on a substrate a coating of a precursor of a crystalline rare earth alkaline earth copper oxide or heavy pnictide mixed alkaline earth copper oxide electrical conductor and converting the precursor to the crystalline electrical conductor. The coating precursor is provided by (a) preparing a solution comprised of a volatilizable solvent and, as a solute, metal-ligand compounds of each of the metals forming the crystalline electrical conductor, the proportions of the solute metals corresponding to those present in the precursor coating and the ligands being inorganic ligands chosen to be volatilizable on heating, (b) spraying the aqueous solution to form discrete liquid particles each containing the metals as metal-ligand compounds in proportions corresponding to those present in the precursor coating, (c) evaporating at least a portion of the volatilizable solvent fronm the liquid particles to form solid particles each containing the metals as metal-ligand compounds in proportions corresponding to those present in the precursor coating. The solid particles can be formulated as a screen printing composition to facilitate coating on the substrate.
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Carnall, Jr. Edward
Ferranti Steven A.
Mir Jose M.
Strom Laurie A.
Beck Shrive
Eastman Kodak Company
King Roy V.
Thomas Carl O.
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